(KH) [7693-26-7] HK (MW 40.11) InChI = 1S/K.H InChIKey = NTTOTNSKUYCDAV-UHFFFAOYSA-N (HMPA) [680-31-9] C6H18N3OP (MW 179.24) InChI = 1S/C6H18N3OP/c1-7(2)11(10,8(3)4)9(5)6/h1-6H3 InChIKey = GNOIPBMMFNIUFM-UHFFFAOYSA-N (strong base used for the deprotonation of alcohols, ketones, and silanes; HMPA appears to facilitate subsequent transformations such as fragmentations and sigmatropic rearrangements) Physical Data: see entries for Potassium Hydride and Hexamethylphosphoric Triamide.

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Aqueous aza Diels-Alder reactions of chiral aldehydes, prepared from carbohydrates, with benzylamine hydrochloride and cyclopentadiene, were promoted by lanthanide triflates. The exo/endo selectivities and diastereoselectivities of the reactions were elucidated by NMR, CD spectroscopy, and X-ray crystallography. The nitrogen-containing heterocyclic products were further transformed to azasugars, which are potential inhibitors against glycoprocessing enzymes.

ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTLanthanide-Promoted Reactions of Aldehydes and Amine Hydrochlorides in Aqueous Solution. Synthesis of 2,3-Dihydropyridinium and Pyridinium DerivativesLi-Bing Yu, Depu Chen, Jun Li, Johnny Ramirez, Peng George Wang, and Simon G. BottView Author Information Department of Chemistry, University of Miami, P.O. Box 249118, Coral Gables, Florida 33124 Department of Chemistry, University of North Texas, P.O. Box 5068, Denton, Texas 76203 Cite this: J. Org. Chem. 1997, 62, 1, 208–211Publication Date (Web):January 10, 1997Publication History Received21 June 1996Published online10 January 1997Published inissue 1 January 1997https://pubs.acs.org/doi/10.1021/jo961175nhttps://doi.org/10.1021/jo961175nbrief-reportACS PublicationsCopyright © 1997 American Chemical SocietyRequest reuse permissionsArticle Views766Altmetric-Citations47LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-AlertscloseSupporting Info (1)»Supporting Information Supporting Information SUBJECTS:Aldehydes,Amines,Cations,Lanthanides,Solution chemistry Get e-Alerts

The synthesis of natural product, dephostatin, is described. Both dephostatin and N-methyl-N-nitrosoaniline are found to inactivate the homogeneous recombinant Yersinia and mammalian protein tyrosine phosphatases in a concentration and time dependent manner.

(-) Conduritol B in a racemic mixture was galactosylated enantioselectively at the allylic site by a beta 1,4-galactosyltransferase catalyzed reaction. Enantioselectivity of the reaction supports a binding model of the galactosyltransferase for modified acceptor substrates.